660071906000 has 80 divisors (see below), whose sum is σ = 1718827310928. Its totient is φ = 243718848000.

The previous prime is 660071905981. The next prime is 660071906017. The reversal of 660071906000 is 609170066.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 125313168016 + 534758737984 = 353996^2 + 731272^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12667691 + ... + 12719690.

Almost surely, 2^660071906000 is an apocalyptic number.

It is an amenable number.

660071906000 is an abundant number, since it is smaller than the sum of its proper divisors (1058755404928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660071906000 is a wasteful number, since it uses less digits than its factorization.

660071906000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25387417 (or 25387401 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The spelling of 660071906000 in words is "six hundred sixty billion, seventy-one million, nine hundred six thousand".